NPPES file of Aug 9, 2026

Sarah Butler Mazerall, MBA, MS, RD, LDN

Registered Dietitian · Boston, MA

Sarah Butler Mazerall, MBA, MS, RD, LDN is a registered dietitian with a practice address in Boston, Massachusetts, and NPI 1972733483, issued on Jul 17, 2009. Check the license (Massachusetts 2734, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1972733483
Name
Sarah Butler Mazerall
Credential
MBA, MS, RD, LDN
Primary taxonomy
Registered Dietitian 133V00000X
License number
2734 MA
Self-reported in NPPES; status is on the state search
Practice location
133 Brookline Ave, Boston, MA 02215
Phone
(617) 629-6444
Enumerated
Jul 17, 2009
Record last updated
Oct 29, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(617) 629-6070
Medicare enrollment
Enrolled (PECOS I20150922001232); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest registered dietitian records → All 2,244 in Massachusetts → Look up another NPI →

Also registered at 133 Brookline Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Shari Abramowitz, M.D.Pediatrics Physician1558346593
  2. Maansi AgheraAudiologist1225887292
  3. Nathalie Alexis, PSY.D.Clinical Psychologist1245886993
  4. Marina Alfisher, MDDiagnostic Radiology Physician1417925207
  5. Andrew Allmendinger, DODiagnostic Radiology Physician1972820942
  6. Dana An, LCSWClinical Social Worker1215108238

Verify Sarah Butler Mazerall in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license 2734    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Atrius Health IncBoston, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Sarah Butler Mazerall among 2,244 registered dietitian records in Massachusetts

Sarah Butler Mazerall, MBA, MS, RD, LDN is one of 2,244 registered dietitian records with a practice address in Massachusetts. 6% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 24% of them.

  • NPI issued2009 · 24% of these records are older, 72% newer
  • In a Medicare fileYes · 6% of these records are
  • In the CMS Doctors and Clinicians fileYes · 9% of these records are
  • Graduated2008 · median 2011 among the 202 with a school on file
  • Record last updated2015 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 133V00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Registered Dietitian providers in Massachusetts

There are 2,244 registered dietitian records in Massachusetts.

All 2,244 in Massachusetts → Every provider in Boston → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Sandra Allonen, RDBoston, MA 022151659404473
  2. Alison Books, MS, RD, LDNBoston, MA 022151568512671
  3. Kattia Corrales-Yauckoes, MS, RD, LDNBoston, MA 022151528073277
  4. Melinda Dennis, MS, RD, LDNBoston, MA 022151508920034
  5. Ann Feldman, MS, RD, CDEBoston, MA 022151457324386
  6. Melissa Gilman, RDBoston, MA 022151598738494
  7. Laurie Higgins, MS, RD, LDN, CDEBoston, MA 022151922022706
  8. Elisabeth Moore, R.D.Boston, MA 022151912063165

Common questions

What is Sarah Butler Mazerall, MBA, MS, RD, LDN's NPI number?

Sarah Butler Mazerall, MBA, MS, RD, LDN's National Provider Identifier (NPI) is 1972733483, issued on Jul 17, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Sarah Butler Mazerall, MBA, MS, RD, LDN located?

The NPPES record lists a practice address at 133 Brookline Ave, Boston, MA, 02215. Phone: (617) 629-6444. Providers update this record themselves, so call before visiting.

How can I verify Sarah Butler Mazerall, MBA, MS, RD, LDN's license?

NPPES lists Massachusetts license number 2734, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.